$ git clone -n https://src.fedoraproject.org/rpms/crash.git /var/lib/mock/f39-build-2353448-60254/root/chroot_tmpdir/scmroot/crash
Cloning into '/var/lib/mock/f39-build-2353448-60254/root/chroot_tmpdir/scmroot/crash'...
$ git fetch origin 821d228948c75d5630bb8e8ba48484f256e207ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crash
 * [new ref]         821d228948c75d5630bb8e8ba48484f256e207ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 821d228 Update to the latest commit <5977936c0a91>